A 75 year old female with shortness of breath presents to your ED. Vital signs: BP 130/70, PR 90/min, RR 28/min.

Her arterial blood gas on room air shows:pH 7.49  (7.36-7.44)

pCO2  27.5  (35-45  mmHg)

pO2  61.2

HCO3  20.7  (22-26  mmol/l)

BE  -1.3

Na  126  (137-145  mmol/l)

K  4.4  (3.5-5  mmol/l)

Cl  95  (99-111  mmol/l)

Describe and interpret her blood gas